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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Parasitica" - Parasitoid Wasps » Cynipoidea » Gall Wasps (Cynipidae) » Oak Gall Wasps (Cynipini)
Photo#512886
Growths on oak leaves
Copyright © 2011 R. Berg

Growths on oak leaves
Yosemite Valley, Mariposa County, California, USA
April 3, 2011
Galls? Scale insects? The one in focus is 3.0 mm long. The host is an oak tree about 8 feet tall, probably canyon live oak, Quercus chrysolepis.

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Growths on oak leaves Growths on oak leaves
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Contributed by R. Berg on 7 May, 2011 - 12:40pm
Last updated 28 January, 2023 - 3:43pm

Moved
Moved from Unidentified Galls.
… Adam Kranz, 28 January, 2023 - 3:43pm login or register to post comments

Moved
Moved from ID Request.
… R. Berg, 8 May, 2011 - 7:35pm login or register to post comments

not sure
There's a gall that grows canyon live oak made by Heteroecus flavens. The gall bulges more or less equally on both sides of the leaf. The ones I've seen are larger than yours. What did the gall look like from the underside of the leaf?

I don't think this is a scale since it doesn't look detachable.
… Joyce Gross, 7 May, 2011 - 11:15pm login or register to post comments

 
Me, neither
I may not have looked at the underside; I don't have a picture of it. These galls were much flatter than the ones at your link.

We're going back in September. If I photograph galls at that time, I'll be sure to get both sides.
… R. Berg, 7 May, 2011 - 11:48pm login or register to post comments

 
September in Yosemite
September is a good time for oak galls -- there are nice fresh ones you won't see earlier in the year. Look for Huckleberry Oak too, which is small and shrubby, and has good galls.
… Joyce Gross, 8 May, 2011 - 7:22pm login or register to post comments

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